Skip to main content

Full text of "Alternate method for herbarium mounts"

See other formats


BLM LIBRARY 




88013247 



T/N 258 

Filing Code 4112 

Date Issued January 1975 




TECHNICAL NOTE 



U.S. DEPARTMENT OF THE INTERIOR - BUREAU OF LAND MANAGEMENT 



ALTERNATE METHOD FOR 
HERBARIUM MOUNTS 

Rex L. Christensen 
Salmon District, Idaho 




Additional copies of Technical Notes are available from DSC, Federal Center Building 50, Denver, Colo., 80225 



i^f^ r D<^ v -^n ^ 



25? 



ALTERNATE METHOD FOR HERBARIUM MOUNTS 

An employee suggestion submitted by Rex Christensen of the Salmon, Idaho office 
recommends a new procedure for mounting small plants for herbariums. This 
suggestion has been adopted for all Bureau offices on an optional basis. 

The present practice of preparing plant mounts using a plant press is cumber- 
some and time consuming, and the resulting mount is not natural or satisfactory 
for field use. Also, the plant mounts deteriorate in paper folders. 

This new method for preserving plants is limited to full mounts of forbs and 
grasses. Portions of larger plants can be prepared showing important character- 
istics necessary for identification. Plants mounted in this manner continue to 
look natural for many years. 

Two sheets of clear, pressure sensitive adhesive coated plastic cellulose acetate, 
with removable paper backing, are needed for each mount. These sheets are avail- 
able through GSA - No. 9330-618-7213 - in size 9" X 11-3/8", .0005" thick (other 
sizes are available if desired) . 

The procedure is easy and can be accomplished in the field as the plants are 
collected. Two things are important in making a successful mount: (1) The 
plant roots and stems must be free of dirt, and (2) The plant must not be wet. 

Remove the paper backing from one plastic sheet and position it on a flat surface 
with the adhesive side up. Arrange the selected plant, which is clean and free 
of moisture, on the plastic to look as natural as possible. A small sheet of 
paper with pertinent information can be placed in one corner. Next, remove the 
backing from the second plastic sheet and position it with one edge against the 
edge of the first sheet, and then roll with the adhesive sides together, being 
careful to work the air out as it seals. 

When arranging the plant on the first sheet of plastic, allow at least one inch 
around all the edges to assure a good seal. 

These plant mounts can be placed in loose leaf binders for easy reference and 
without danger of breaking, as well as being put in a brief case and taken to 
the field. 










STEP 1 - Plant material is arranged on one plastic 
sheet to look as natural as possible. 




STEP 2 - Paper backing is removed from second sheet. 




STEP 3 - Second sheet is positioned against first 
sheet, then rolled with adhesive sides together. 




STEP 4 - Completed mount, 




Portions of larger plants needed 
for identification can be mounted. 




Mounts are adaptable for field use. (Note - these 
mounts are six years oldO 




Mounts can be stored in loose leaf binders, 



^^> 



tr 0* 






D' 



- 



^V> 



A v .*> , «« oP pP 



4 V> tP ,2^ 



<K ^ 



<? o- rf' 






GPO 857-960 









C- 5 ° -yedeyat 



P • v. 



P-O-TCO 8°^ 



Library 
D-553A, Building 50 
Denver Federal Center 
P.O. Box 25047 
Denver, CO 80325-0047